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Take It Back Instant - Adventure Return target spell to its owner's hand

As Infinite_Bananas states

1 copy: -15 pts 2 copies: -5 pts 3 copies: +5 pts 4 copies+: +15 pts Format Dominance When we refer to format dominance, we are mostly counting up the number of formats that are likely to generate significant and persistent demand for the card in question

Once your field reaches 5 total cost, activate the leader (once per turn, per the card's own "Once Per Turn" tag)

For example, if Gaston's hand is full of four different card types that are going to head into his graveyard shortly, then he wouldn't want that trade to happen

Early sets included a few cards with rules designed to interact with this gambling aspect, allowing replacements of cards up for ante, adding more cards to the ante, or even permanently trading ownership of cards in play